Safety Indicator System (MICU and Gauge Control Module) Input Test

NOTE:

If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A - Refer to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2 (without the HDS)Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode B - Control Unit Not Communicating Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode C - No DTCs and Output Won't Shut OFF Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode D - No DTCs and Output Won't Turn ON .
Before testing, do the gauge control module self-diagnostic function to make sure the beeper and the indicators in the gauge control module work properly and the F-CAN line are OK.
Before testing, make sure the No. A29 (10 A) fuse in the under-hood fuse/relay box is OK.
Before testing, make sure the No. B5 (10 A) fuse in the under-dash fuse/relay box is OK.

MICU

1. Turn the vehicle to the OFF (LOCK) mode

2. Disconnect the following connectors.

Under-dash fuse/relay box connector B (44P)

Under-dash fuse/relay box connector D (32P)

Under-dash fuse/relay box connector W (24P)

Courtesy of HONDA, U.S.A., INC.

Courtesy of HONDA, U.S.A., INC.

3. Inspect the connectors and socket terminals to be sure they are all making good contact:

If the terminals are bent, loose, or corroded, repair them as necessary, and recheck the system.
If the terminals are OK, go to step 4.

4. Reconnect the connectors to the under-dash fuse/relay box, and do the following input tests:

If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, go to step 5.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
D17	RED	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. A29 (10 A) fuse in the under-hood fuse/relay box An open or high resistance in the wire
W6	BLK	In all ignition switch positions or all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G501) An open or high resistance in the ground wire
B32	BLK	In all ignition switch positions or all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G604) An open or high resistance in the ground wire

*1: Without power tailgate*2: With power tailgate

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
B20	BLK	In all ignition switch positions or all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G604) An open or high resistance in the ground wire
D10	BRN	In all ignition switch positions or all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G402) An open or high resistance in the ground wire
B40	GRN	Driver's door open	Measure the voltage to ground: There should be less than 0.2 V.	Faulty driver's door switch Faulty driver's door switch ground An open or high resistance in the wire
B40	GRN	Driver's door closed	Measure the voltage to ground: There should be about 5 V.	Faulty driver's door switch A short to ground in the wire
B29	BRN	Front passenger's door open	Measure the voltage to ground: There should be less than 0.2 V.	Faulty front passenger's door switch Faulty front passenger's door switch ground An open or high resistance in the wire
B29	BRN	Front passenger's door closed	Measure the voltage to ground: There should be about 5 V.	Faulty front passenger's door switch A short to ground in the wire
B33	WHT	Left rear door open	Measure the voltage to ground: There should be less than 0.2 V.	Faulty left rear door switch Faulty left rear door switch ground An open or high resistance in the wire
B33	WHT	Left rear door closed	Measure the voltage to ground: There should be about 5 V.	Faulty left rear door switch A short to ground in the wire
B34	GRY	Right rear door open	Measure the voltage to ground: There should be less than 0.2 V.	Faulty right rear door switch Faulty right rear door switch ground An open or high resistance in the wire
B34	GRY	Right rear door closed	Measure the voltage to ground: There should be about 5 V.	Faulty right rear door switch A short to ground in the wire
B22	PNK	Tailgate open	Measure the voltage to ground: There should be less than 0.2 V.	Faulty tailgate latch switch Poor ground (G603) or an open in the ground wire^1 Power tailgate control unit^2 An open or high resistance in the wire
B22	PNK	Tailgate closed	Measure the voltage to ground: There should be about 5 V.	Faulty tailgate latch switch A short to ground in the wire

*1: Without power tailgate*2: With power tailgate

Gauge Control Module

5. Turn the vehicle to the OFF (LOCK) mode

6. Disconnect the following connector.

Gauge control module connector A (32P)

Courtesy of HONDA, U.S.A., INC.

7. Inspect the connector and socket terminals to be sure they are all making good contact:

If the terminals are bent, loose, or corroded, repair them as necessary, and recheck the system.
If the terminals are OK, go to step 8.

8. Reconnect the connector, and do the following input tests:

If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, go to step 9.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
A1	RED	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. A29 (10 A) fuse in the under-hood fuse/relay box An open or high resistance in the wire
A17	LT GRN	Vehicle ON mode	Measure the voltage to ground: There should be battery voltage.	Blown No. B5 (10 A) fuse in the under-dash sub fuse/relay box An open or high resistance in the wire
A4	BRN	In all ignition switch positions or all power modes	Measure the voltage to ground: There should be less than 0.2 V	Poor ground (G502) An open or high resistance in the ground wire

9. If multiple failures are found on more than one control unit, replace the under-dash fuse/relay box (includes the MICU) . If input failures are related to a particular control unit, replace the gauge control module .